Window sill



Jan. 26, 1932. l. A. BAUM 1,842,956

v WINDOW sILL Filed Feb. 27, 1950 Patented Jan. 26, 1932 .PATENT oFFlcE ISAAC A. BAUM, F CHICAGO, ILLIOIS WINDOW sim.

Application iled February 27, 1930. Serial No. 431,766.

My invention relates to buildings and particularly to a novel window frame construction. Y

A11 object of my invention is to provide a window frame having a sill and stool of novel form and arrangement. A difficulty heretofore experienced in the construction of all-metal window frames has been to provide suitable m-eans for attachment of the sill to the adjacent supporting wall. In the construction here described, I provide for this feature and insure a satisfactory, attractive and efficient arrangement.

In metal frames of this character it is essential that the sill be formed of sheet metal and, as the sill must of necessity have a certain contour and a decided slope as to its upper outward face, th-e space there beneath is necessarily hollow and must be filled with a plastic material such as concrete or mortar. Due

to this fact diiculty has been experienced in filling this space after the frame has been installed. If an attempt is made to set the sill 0n a bed of mortar there is always an uncertainty as to whether the space is illed and there is the further uncertainty as to the rigidity and accuracy of the mounting.

I avoid these objections by providing the s ill with numerous openings or cut-out portions in its upp-er surface, thus enabling the mounting of the sill in an exactly predetermined position, securing it in place by means of screws which are accessible through the openings, and thereafter filling the space with concrete, leveling and painting it at the e3;- posed points. rEhe portion of the sill that might be objectionable if the cut-out portions were left exposed is covered by a stool that may be applied after the frame has been permanently located.

The invention will be more readily undern stood by reference to the accompanying draw ings, in which Fig. l ,is a plan view of a window sill constructed in accordance with my invention;

Fig. 2 isa sectional view through a mounted and completed sill; and

Fig. 3 is an enlarged fragmentary perspective view of one end of the sill showing the means provided for interlocking with a side member.

In the drawings, it will be seen that the. sill is of generallyr channel shape having a web lO withan upstanding rib 1l therein, thereby forming a seat l2 for the bottom member ,of a sash, not shown. p At the two sides I provide downturned flanges lS-lt, the latter having its margin l5' bent at right angles and adapted to receive screws 16 that serve to secure the sill in a desired position.

At intervals I provide cut-outs 17`18-19 in the surfaces lO-ll-lQ to facilitate the application of a plastic material such as concrete, indicated at 20.', The plastic material may be conveniently forced into place and packed securely into the space beneath the web and thereafter carefully leveled to conform to the out-er surface of the sloping portion 10 which will be normally exposed to the weather.

`A plaster terminal member 2l is secured to the surface of the iiange 13 and serves to define theV plaster limit on the inside of the frame. As a means for covering and trimming the inner surface of the sill, I provide a metal stool consistingfof a web 22 one edge of which is bent to provide the vertical portion 23 and the horizontal covering 24: that overlies the rib ll and the cut-outs therein. The opposite edge of the web is downwardly and backwardly bent as at 25-26 to snugly fit over a U-shaped clip 27 that is welded to the flange 13. Screws 28 passing upwardly from beneath the overhanging portion of the stool serve to form a rigid fastening for the inner portion of the stool. Screws 29 serve a similar purpose for the forwardly project* ing edge of the stool. The metal stool element may be shaped as desired to conform to the architects design, the angular construction here illustrated being selected for si1nplicity. This stool member serves to cover the openings 18-19 in the sill that might be considered to be unsightly. 5 The sill member as shown in Figs. l and 3 will preferably be installed and permanently mounted, together with side and head frame members, not shown, that are provided with interlocking corner connections. A connection for a side member is illustrated in Fig. 3 and comprises plates 8O having tongues 31 that are welded to the flanges 13-14, the plates being joined by a channel 32. Vertical langes 33 formed on the plate 80 are adapted to cooperate with suitably formed sockets on the side member. The form of the corner connection is illustrated and described in my copending application Serial No. 431,764, filed of even date herewith.

bviously the construction is capable of some modification and I do not wish to be limited except as indicated in the appended claims.

I claim:

1. A sill for metal window frames comprising in combination a sheet formed to provide a seat for a sash and having downturned marginal flanges, the sheet being cut away at intervals to facilitate the filling of the space beneath the sill with plastic material.

2. A sill for metal window frames comprising in combination a sheet formed to provide a seat for a sash and having downturned marginal flanges adapted to space the sill above a support, the sheet being cut away at intervals to facilitate the filling of the space beneath the sill with plastic material.

3. A sill for metal window frames comprising in combination a sheet formed to provide a seat for a sash and having downturned marginal flanges adapted to space the sill above a support, and fastening devices for securing a flange to said support, the sheet being cut away at intervals to facilitate the application of said fastening devices and the filling of the space with plastic material.

1l. A metal window sill comprising in combination a channel shaped member, the web of which is formed to provide a sash seat, said web having cut-out areas to facilitate the filling of the space beneath the web with plastic material, and a separate member sscured to the sill and adapted to trim the inner exposure of the sill.

5. A metal window sill comprising in combination a channel member, the web of which is formed to provide a sash seat, said web having cut-out areas to facilitate the filling of the space beneath the web with plastic 6U material, a separate member secured to the sill and adapted to trim the inner exposure of the sill, and to cover some of said cut-out areas.

6. In a metal window sill, the combination 65 of a plate of inverted channel shape in cross signature.

ISAAC A. BAUM. 

